Provided is a refrigerator including: a main body; a storage compartment provided in the main body, the storage compartment configured to have a shelf arranged therein; and shelf fixing devices provided at opposite sidewalls inside the storage compartment to fix the shelf, wherein the shelf fixing device includes: a shelf support portion configured to support a lower side of the shelf, and move downward as a load the shelf increases; a shelf fixing portion configured to fix the shelf at an upper side of the shelf, and move downward in linkage with the shelf support portion; and a connecting portion configured to connect the shelf support portion to the shelf fixing portion, and adjust a distance between the shelf support portion and the shelf fixing portion according to the load on the shelf such that a fixing force on the shelf is changed.